87308881 has 6 divisors (see below), whose sum is σ = 95967746. Its totient is φ = 79371600.

The previous prime is 87308869. The next prime is 87308887. The reversal of 87308881 is 18880378.

It can be written as a sum of positive squares in only one way, i.e., 84364225 + 2944656 = 9185^2 + 1716^2 .

It is not a de Polignac number, because 87308881 - 2¹¹ = 87306833 is a prime.

It is a super-2 number, since 2×87308881² = 15245681402944322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87308887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360660 + ... + 360901.

Almost surely, 2^87308881 is an apocalyptic number.

It is an amenable number.

87308881 is a deficient number, since it is larger than the sum of its proper divisors (8658865).

87308881 is a wasteful number, since it uses less digits than its factorization.

87308881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721583 (or 721572 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 87308881 is about 9343.9221422270. The cubic root of 87308881 is about 443.6285360608.

The spelling of 87308881 in words is "eighty-seven million, three hundred eight thousand, eight hundred eighty-one".